题目内容
解方程或比例.
①
x-2=0.5
②
=
③X:12=
:2.8.
①
| 5 |
| 48 |
②
| x |
| 8.1 |
| 4 |
| 10.8 |
③X:12=
| 7 |
| 4 |
(1)
x-2=0.5,
x-2+2=0.5+2,
x×
=2.5×
,
x=24;
(2)
=
,
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3)x:12=
:2.8,
2.8x=12×
,
2.8x÷2.8=21÷2.8,
x=7.5.
| 5 |
| 48 |
| 5 |
| 48 |
| 5 |
| 48 |
| 48 |
| 5 |
| 48 |
| 5 |
x=24;
(2)
| x |
| 8.1 |
| 4 |
| 10.8 |
10.8x=8.1×4,
10.8x÷10.8=32.4÷10.8,
x=3;
(3)x:12=
| 7 |
| 4 |
2.8x=12×
| 7 |
| 4 |
2.8x÷2.8=21÷2.8,
x=7.5.
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